Pith Number

pith:JCVQTAYB

pith:2009:JCVQTAYBUAOIFDAN3NMBRPFPRK

not attested not anchored not stored refs pending

The nature of optical and near-infrared variability of BL Lacertae

C.M. Raiteri, M. Villata, V.M. Larionov

arxiv:0912.1867 v1 · 2009-12-09 · astro-ph.CO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{JCVQTAYBUAOIFDAN3NMBRPFPRK}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T02:10:25.068651Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

48ab098301a01c828c0ddb5818bcaf8a988ea6a4c4bd4153a1a047d424c623d2

Aliases

arxiv: 0912.1867 · arxiv_version: 0912.1867v1 · doi: 10.48550/arxiv.0912.1867 · pith_short_12: JCVQTAYBUAOI · pith_short_16: JCVQTAYBUAOIFDAN · pith_short_8: JCVQTAYB

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/JCVQTAYBUAOIFDAN3NMBRPFPRK \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 48ab098301a01c828c0ddb5818bcaf8a988ea6a4c4bd4153a1a047d424c623d2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5314b95c05e5e5898be781608a7c438b15bd5f216f8ecf1cf1cb2900fbb76a4f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2009-12-09T21:38:23Z",
    "title_canon_sha256": "db2b092bfbd4bbb01ccea623e2a2f69dae28247c1c48b9bf20b9c923cc4f90f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.1867",
    "kind": "arxiv",
    "version": 1
  }
}